EPR studies of some f /sup n/ and d /sup n/ electronic impurities in KTaO/sub 3/ single crystals

Journal Article · Sat Sep 15 04:00:00 EDT 1984 · J. Chem. Phys.; (United States)

OSTI ID:6552107

Abraham, M M; Boatner, L A; Olson, D N; Hoechli, U T

Single crystals of the cubic perovskite host, potassium tantalate (KTaO/sub 3/), doped with iron group, lanthanide, and actinide impurities have been investigated using the technique of electron paramagnetic resonance (EPR). The EPR spectra of Yb/sup 3 +/ and U/sup 5 +/ have been observed for the first time in potassium tantalate by employing crystals co-doped with both impurities. Multiple doping of the material during the crystal growth process avoided the production of semiconducting KTaO/sub 3/ and resulted in the incorporation of adequate concentrations of the trivalent lanthanide ion Yb/sup 3 +/. The EPR results indicate that Yb/sup 3 +/ occupies a site in which the local symmetry is axial as a result of nearby charge compensation. Pentavalent uranium is found to occupy a substitutional cubic symmetry site. EPR investigations of Cu/sup 2 +/, Co/sup 2 +/, Mn/sup 2 +/, Ni/sup 3 +/, and Fe/sup 3 +/ were also carried out.

• Research Organization: Solid State Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 6552107
• Journal Information: J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 81:6; ISSN JCPSA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360602* -- Other Materials-- Structure & Phase Studies
ALKALI METAL COMPOUNDS
CHARGED PARTICLES
COBALT IONS
COPPER IONS
CRYSTALS
DOPED MATERIALS
ELECTRON SPIN RESONANCE
IMPURITIES
IONS
IRON IONS
MAGNETIC RESONANCE
MANGANESE IONS
MATERIALS
MONOCRYSTALS
NICKEL IONS
OXYGEN COMPOUNDS
POTASSIUM COMPOUNDS
RESONANCE
TANTALATES
TANTALUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
URANIUM IONS
YTTERBIUM IONS